From: Luca Ceresoli luca.ceresoli@bootlin.com
[ Upstream commit e8470c0a7bcaa82f78ad34282d662dd7bd9630c2 ]
Commit 03e909acd95a ("drm/panel: simple: Add support for AUO G121EAN01.4 panel") added support for this panel model, but the timings it implements are very different from what the datasheet describes. I checked both the G121EAN01.0 datasheet from [0] and the G121EAN01.4 one from [1] and they all have the same timings: for example the LVDS clock typical value is 74.4 MHz, not 66.7 MHz as implemented.
Replace the timings with the ones from the documentation. These timings have been tested and the clock frequencies verified with an oscilloscope to ensure they are correct.
Also use struct display_timing instead of struct drm_display_mode in order to also specify the minimum and maximum values.
[0] https://embedded.avnet.com/product/g121ean01-0/ [1] https://embedded.avnet.com/product/g121ean01-4/
Fixes: 03e909acd95a ("drm/panel: simple: Add support for AUO G121EAN01.4 panel") Signed-off-by: Luca Ceresoli luca.ceresoli@bootlin.com Reviewed-by: Neil Armstrong neil.armstrong@linaro.org Signed-off-by: Neil Armstrong neil.armstrong@linaro.org Link: https://patchwork.freedesktop.org/patch/msgid/20230804151239.835216-1-luca.c... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/panel/panel-simple.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c index e02249b212c2a..cf6b146acc323 100644 --- a/drivers/gpu/drm/panel/panel-simple.c +++ b/drivers/gpu/drm/panel/panel-simple.c @@ -969,21 +969,21 @@ static const struct panel_desc auo_g104sn02 = { .connector_type = DRM_MODE_CONNECTOR_LVDS, };
-static const struct drm_display_mode auo_g121ean01_mode = { - .clock = 66700, - .hdisplay = 1280, - .hsync_start = 1280 + 58, - .hsync_end = 1280 + 58 + 8, - .htotal = 1280 + 58 + 8 + 70, - .vdisplay = 800, - .vsync_start = 800 + 6, - .vsync_end = 800 + 6 + 4, - .vtotal = 800 + 6 + 4 + 10, +static const struct display_timing auo_g121ean01_timing = { + .pixelclock = { 60000000, 74400000, 90000000 }, + .hactive = { 1280, 1280, 1280 }, + .hfront_porch = { 20, 50, 100 }, + .hback_porch = { 20, 50, 100 }, + .hsync_len = { 30, 100, 200 }, + .vactive = { 800, 800, 800 }, + .vfront_porch = { 2, 10, 25 }, + .vback_porch = { 2, 10, 25 }, + .vsync_len = { 4, 18, 50 }, };
static const struct panel_desc auo_g121ean01 = { - .modes = &auo_g121ean01_mode, - .num_modes = 1, + .timings = &auo_g121ean01_timing, + .num_timings = 1, .bpc = 8, .size = { .width = 261,